US20040102272A1 - Engine endless drive belt tensioner and tensioner position indicator - Google Patents
Engine endless drive belt tensioner and tensioner position indicator Download PDFInfo
- Publication number
- US20040102272A1 US20040102272A1 US10/303,239 US30323902A US2004102272A1 US 20040102272 A1 US20040102272 A1 US 20040102272A1 US 30323902 A US30323902 A US 30323902A US 2004102272 A1 US2004102272 A1 US 2004102272A1
- Authority
- US
- United States
- Prior art keywords
- tensioner
- drive belt
- flexing element
- belt
- vehicle engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
- F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
- F16H7/1254—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means
- F16H7/1281—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/081—Torsion springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0861—Means for varying tension of belts, ropes, or chains comprising means for sensing tensioner position
Definitions
- the present invention relates to endless transmission belts and more particularly to a belt tensioner and tensioner position indicating device for developing an indication of the condition of the endless transmission belt.
- Front end accessory components for a truck engine such as an air conditioning compressor, a power steering pump, an alternator and a cooling fan, and internal engine components such as cam shafts and oil pumps, are often driven by one or more endless transmission belts installed between a rotatable element of the vehicle's engine, typically the engine crankshaft, and a pulley for the driven component. It is undesirable for these belts to slip since slip produces, belt wear, frictional losses and loss of output from the driven component. In addition, slip can indicate the possible deterioration of the belt and its possible separation or detraining from its pulleys. Maintaining belt tension reduces slip and extends the life of endless transmission belts by taking slack out of the endless loop. However, simply maintaining tension on a belt becomes less effective with aging of the belt due the belt's loss of elasticity.
- the invention provides a drive belt tensioner and belt deflection detector for a vehicle engine comprising a tensioner anchor mounted with respect to the engine.
- a flexing element is mounted on the tensioner anchor.
- a tensioner pulley depends from the flexing element and is biased by the flexing element into contact with a drive belt.
- a deflection sensor is positioned with respect to the flexing element to indicate changes in position of the flexing element reflecting changes in deflection of the drive belt.
- FIG. 1 is a perspective view of a truck tractor.
- FIG. 2 is a perspective view of the front portion of a truck tractor chassis.
- FIG. 3 is a front elevation of an engine equipped with the tensioner and deflection measuring apparatus of the invention in accordance with a first embodiment thereof.
- FIG. 4 is a perspective view of a swing tensioner in accordance with the embodiment of FIG. 3.
- FIG. 5 is a front elevation of a swing tensioner and deflection measuring apparatus in accordance with the embodiment of FIG. 3.
- FIG. 6 is a side elevation of a swing tensioner and deflection measuring apparatus.
- FIG. 7 is a perspective view of a tensioner in accordance with a second embodiment of the invention.
- FIGS. 8 A-B are schematics of a deflection measuring apparatus suitable for use with the second embodiment of the tensioner.
- FIGS. 9 A-B are schematics of a second deflection measuring apparatus adapted for use with the second embodiment of the tensioner.
- FIG. 1 illustrates in perspective a truck tractor 10 comprising a cab 11 and an engine housing 12 .
- Engine housing 12 encloses an engine under a heavy, folding hood 13 , which must be lifted for access to many engine related components and drive belts, the condition of which must be monitored as part of commercial vehicle pre-trip inspections.
- FIG. 2 a portion of a vehicle chassis 14 is illustrated comprising two side rails 15 and 17 with an engine 16 supported between the rails.
- the side rails 15 and 17 are in turn supported from wheels 18 arranged outside of the side rails.
- a crankshaft 20 extends from the front of engine 16 .
- a drive pulley 22 is fitted to crankshaft and a driven pulley 26 is positioned above pulley 22 for driving a cooling fan 28 .
- An endless drive belt 24 is fitted around pulleys 22 and 26 allowing fan 28 to be driven by crankshaft 22 .
- Fan 28 is an example of one of many types of accessories that can be driven by a drive belt, others including air conditioning compressors, water pumps, power steering pumps, superchargers, etc.
- Endless drive belt 24 is kept under tension by a tensioning mechanism 30 , which is shown mounted to side rail 17 , but which may be positioned on any fixed point of the vehicle.
- Tensioning mechanism 30 comprises a spring element for deflecting endless belt 24 .
- the degree of deflection is detected by a deflection sensor 32 .
- FIG. 3 one of the preferred embodiments of a belt tensioner 130 and deflection detection apparatus 132 are disclosed supported on an engine 116 .
- An endless drive belt 124 is fitted around pulleys 122 , 36 , 38 and 40 .
- Pulley 122 is driven by crankshaft 120 .
- Pulleys 36 , 38 and 40 drive vehicle accessories or other engine components, such as camshafts.
- Tensioning mechanism 130 includes a tensioning roller 140 which is urged against belt 124 between pulleys 122 and 36 keeping the belt under tension.
- Tensioning roller 140 is mounted at the end of a swinging arm 138 , which extends from a rotatable base element 136 .
- Base element 136 is spring loaded to urge arm 138 in a counterclockwise direction toward belt 124 .
- Rotatable base element 136 carries a sensor target 133 which passes a sensor 132 to provide an indication of the rotational position of tensioning mechanism 130 .
- FIGS. 4, 5 and 6 illustrate a tensioning mechanism 130 in greater detail.
- Tensioning mechanism 130 may be anchored by its base 142 on an engine, fixed plate or segment of the vehicle's frame, so that its position relative to the crankshaft is fixed.
- Rotatable element 136 rotates on base 142 . Rotation is limited by, and biased in a preferred direction, by a coil spring 144 wound between base 142 and a perimeter ring 146 .
- Arm 138 which extends from the perimeter ring 146 , rotates in a direction A as urged by spring 144 until a pulley or roller 140 , mounted on the free swinging end of arm 138 , comes into contact with a belt.
- rotational element 136 and arm 138 flex to tense a belt against which roller 140 rides.
- Roller 140 is mounted for rotation on the free end of arm 138 as indicated by double arrow B.
- a deflection sensor is implemented by providing a plurality of sensor targets 130 , distributed around the outside of perimeter ring 146 .
- These sensor targets 130 may be magnets, used to complete inductance circuits with a electro-magnetic sensor 132 , which the sensors targets pass with changes in the position of rotational element 138 . Changes in the inductance of the electro-magnetic sensor are readily detectable allowing the rotational position of rotational element 136 to determined continuously. The rotational position of element 136 directly tracks changes in the deflection of a drive belt.
- targets 130 may be simple throws toggling the position of a switch 132 to indicate whether the deflection of a drive belt has fallen below a minimum desired degree, indicating loss of elasticity.
- FIG. 6 illustrates yet another alternative for the deflection/displacement sensor embodied in a rotating potentiometer 230 mounted over coil spring 144 on rotating element 136 .
- FIG. 7 illustrates a linear tensioner 180 implemented using a flexing element 182 which here may be a spring.
- Flexing element 182 is anchored at one end in a structure 184 which may be the engine or a section of the vehicle's frame.
- the other, free end of flexing element 182 terminates in a flexing element to belt connector 186 implemented using a roller 188 set for rotation in a hanger 190 .
- Roller 188 impinges on belt 191 deflecting the belt to apply tension thereto.
- FIGS. 8 A-B illustrate the use of a two position switch 200 having a toggle lever 202 which moves with changes in extension of the flexing element 182 responding to changes in the deflection of belt 191 occurring with the belt's changes in elasticity.
- the state of switch 200 is provided to a vehicle onboard computer 250 .
- FIGS. 9 A-B A more complex arrangement is illustrated in FIGS. 9 A-B allowing the degree in change in deflection to be monitored.
- a fixed point on flexible element is associated with a sliding contact 203 on resistor 205 .
- Resistor 205 is connected in parallel with a constant voltage source 207 .
- the voltage between the sliding contact 203 and a terminal of the constant voltage source 207 is measured by voltmeter 209 and reflects changes in extension of flexing element 182 .
- Voltage readings from voltmeter 209 are provided an analog to digital converter 211 before being passed to the vehicle's onboard computer 250 .
- Programming of onboard computer 250 allows the computer to equate particular voltage levels with condition or loosening of belt 191 .
- a variety of sensors may be used to accomplish the task of measuring changes in belt deflection. These include potentiometers, non-contacting proximity magnetic sensors of either the linear or angular sort, or in general any sensor that measures displacement.
- the present invention provides an engine accessory belt tension indication mechanism which indicates both belt tension and possible loss of belt elasticity without the need to open a vehicle hood. The primary function of the tensioner is not applying tension to the belt, although it can provide that function, but rather its purpose is to keep the flexing element tautly stretched between a fixed point on the vehicle and the belt. This allows changes in belt deflection to be detected.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
Description
- 1. Field of the Invention
- The present invention relates to endless transmission belts and more particularly to a belt tensioner and tensioner position indicating device for developing an indication of the condition of the endless transmission belt.
- 2. Description of the Problem
- Front end accessory components for a truck engine, such as an air conditioning compressor, a power steering pump, an alternator and a cooling fan, and internal engine components such as cam shafts and oil pumps, are often driven by one or more endless transmission belts installed between a rotatable element of the vehicle's engine, typically the engine crankshaft, and a pulley for the driven component. It is undesirable for these belts to slip since slip produces, belt wear, frictional losses and loss of output from the driven component. In addition, slip can indicate the possible deterioration of the belt and its possible separation or detraining from its pulleys. Maintaining belt tension reduces slip and extends the life of endless transmission belts by taking slack out of the endless loop. However, simply maintaining tension on a belt becomes less effective with aging of the belt due the belt's loss of elasticity.
- Good belt operation is considered important enough that checking belt tension has been made part of the commercial vehicle standard pre-trip inspection. Drivers have had to feel the belts to determine belt tightness, unless a belt is so loose that a gap is visually detectable. However, belt slippage due to deterioration in the condition of the belt can occur before a loose belt becomes detectable by touch or sight. Direct inspection can also be cumbersome, involving the movement of heavy or large hoods to reach the locations of the various belts. For a driver who suffers from impaired mobility, these tasks can be very difficult and time consuming.
- The invention provides a drive belt tensioner and belt deflection detector for a vehicle engine comprising a tensioner anchor mounted with respect to the engine. A flexing element is mounted on the tensioner anchor. A tensioner pulley depends from the flexing element and is biased by the flexing element into contact with a drive belt. A deflection sensor is positioned with respect to the flexing element to indicate changes in position of the flexing element reflecting changes in deflection of the drive belt.
- Additional effects, features and advantages will be apparent in the written description that follows.
- The novel features believed characteristic of the invention are set forth in the appended claims. The invention itself however, as well as a preferred mode of use, further objects and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying drawings, wherein:
- FIG. 1 is a perspective view of a truck tractor.
- FIG. 2 is a perspective view of the front portion of a truck tractor chassis.
- FIG. 3 is a front elevation of an engine equipped with the tensioner and deflection measuring apparatus of the invention in accordance with a first embodiment thereof.
- FIG. 4 is a perspective view of a swing tensioner in accordance with the embodiment of FIG. 3.
- FIG. 5 is a front elevation of a swing tensioner and deflection measuring apparatus in accordance with the embodiment of FIG. 3.
- FIG. 6 is a side elevation of a swing tensioner and deflection measuring apparatus.
- FIG. 7 is a perspective view of a tensioner in accordance with a second embodiment of the invention.
- FIGS.8A-B are schematics of a deflection measuring apparatus suitable for use with the second embodiment of the tensioner.
- FIGS.9A-B are schematics of a second deflection measuring apparatus adapted for use with the second embodiment of the tensioner.
- FIG. 1 illustrates in perspective a
truck tractor 10 comprising acab 11 and anengine housing 12.Engine housing 12 encloses an engine under a heavy,folding hood 13, which must be lifted for access to many engine related components and drive belts, the condition of which must be monitored as part of commercial vehicle pre-trip inspections. - Referring now to FIG. 2, a portion of a
vehicle chassis 14 is illustrated comprising twoside rails 15 and 17 with anengine 16 supported between the rails. Theside rails 15 and 17 are in turn supported fromwheels 18 arranged outside of the side rails. Acrankshaft 20 extends from the front ofengine 16. Adrive pulley 22 is fitted to crankshaft and a drivenpulley 26 is positioned abovepulley 22 for driving a cooling fan 28. An endless drive belt 24 is fitted aroundpulleys crankshaft 22. Fan 28 is an example of one of many types of accessories that can be driven by a drive belt, others including air conditioning compressors, water pumps, power steering pumps, superchargers, etc. Endless drive belt 24 is kept under tension by atensioning mechanism 30, which is shown mounted toside rail 17, but which may be positioned on any fixed point of the vehicle.Tensioning mechanism 30 comprises a spring element for deflecting endless belt 24. The degree of deflection is detected by adeflection sensor 32. - Referring now to FIG. 3, one of the preferred embodiments of a
belt tensioner 130 anddeflection detection apparatus 132 are disclosed supported on anengine 116. Anendless drive belt 124 is fitted aroundpulleys crankshaft 120. Pulleys 36, 38 and 40 drive vehicle accessories or other engine components, such as camshafts.Tensioning mechanism 130 includes atensioning roller 140 which is urged againstbelt 124 betweenpulleys Tensioning roller 140 is mounted at the end of a swingingarm 138, which extends from arotatable base element 136.Base element 136 is spring loaded to urgearm 138 in a counterclockwise direction towardbelt 124.Rotatable base element 136 carries asensor target 133 which passes asensor 132 to provide an indication of the rotational position oftensioning mechanism 130. - FIGS. 4, 5 and6 illustrate a
tensioning mechanism 130 in greater detail.Tensioning mechanism 130 may be anchored by itsbase 142 on an engine, fixed plate or segment of the vehicle's frame, so that its position relative to the crankshaft is fixed.Rotatable element 136 rotates onbase 142. Rotation is limited by, and biased in a preferred direction, by acoil spring 144 wound betweenbase 142 and aperimeter ring 146.Arm 138, which extends from theperimeter ring 146, rotates in a direction A as urged byspring 144 until a pulley orroller 140, mounted on the free swinging end ofarm 138, comes into contact with a belt. Taken together,rotational element 136 andarm 138 flex to tense a belt against which roller 140 rides.Roller 140 is mounted for rotation on the free end ofarm 138 as indicated by double arrow B. - In FIG. 5 a deflection sensor is implemented by providing a plurality of
sensor targets 130, distributed around the outside ofperimeter ring 146. Thesesensor targets 130 may be magnets, used to complete inductance circuits with a electro-magnetic sensor 132, which the sensors targets pass with changes in the position ofrotational element 138. Changes in the inductance of the electro-magnetic sensor are readily detectable allowing the rotational position ofrotational element 136 to determined continuously. The rotational position ofelement 136 directly tracks changes in the deflection of a drive belt. Alternatively, targets 130 may be simple throws toggling the position of aswitch 132 to indicate whether the deflection of a drive belt has fallen below a minimum desired degree, indicating loss of elasticity. FIG. 6 illustrates yet another alternative for the deflection/displacement sensor embodied in arotating potentiometer 230 mounted overcoil spring 144 onrotating element 136. - FIG. 7 illustrates a
linear tensioner 180 implemented using aflexing element 182 which here may be a spring. Flexingelement 182 is anchored at one end in astructure 184 which may be the engine or a section of the vehicle's frame. The other, free end of flexingelement 182 terminates in a flexing element to belt connector 186 implemented using aroller 188 set for rotation in ahanger 190.Roller 188 impinges onbelt 191 deflecting the belt to apply tension thereto. - FIGS.8A-B illustrate the use of a two
position switch 200 having atoggle lever 202 which moves with changes in extension of the flexingelement 182 responding to changes in the deflection ofbelt 191 occurring with the belt's changes in elasticity. The state ofswitch 200 is provided to a vehicleonboard computer 250. A more complex arrangement is illustrated in FIGS. 9A-B allowing the degree in change in deflection to be monitored. Here a fixed point on flexible element is associated with a slidingcontact 203 onresistor 205.Resistor 205 is connected in parallel with aconstant voltage source 207. The voltage between the slidingcontact 203 and a terminal of theconstant voltage source 207 is measured by voltmeter 209 and reflects changes in extension of flexingelement 182. Voltage readings from voltmeter 209 are provided an analog to digital converter 211 before being passed to the vehicle'sonboard computer 250. Programming ofonboard computer 250 allows the computer to equate particular voltage levels with condition or loosening ofbelt 191. - A variety of sensors may be used to accomplish the task of measuring changes in belt deflection. These include potentiometers, non-contacting proximity magnetic sensors of either the linear or angular sort, or in general any sensor that measures displacement. The present invention provides an engine accessory belt tension indication mechanism which indicates both belt tension and possible loss of belt elasticity without the need to open a vehicle hood. The primary function of the tensioner is not applying tension to the belt, although it can provide that function, but rather its purpose is to keep the flexing element tautly stretched between a fixed point on the vehicle and the belt. This allows changes in belt deflection to be detected.
- While the invention is shown in only one of its forms, it is not thus limited but is susceptible to various changes and modifications without departing from the spirit and scope of the invention.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/303,239 US6849011B2 (en) | 2002-11-23 | 2002-11-23 | Engine endless drive belt tensioner and tensioner position indicator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/303,239 US6849011B2 (en) | 2002-11-23 | 2002-11-23 | Engine endless drive belt tensioner and tensioner position indicator |
Publications (2)
Publication Number | Publication Date |
---|---|
US20040102272A1 true US20040102272A1 (en) | 2004-05-27 |
US6849011B2 US6849011B2 (en) | 2005-02-01 |
Family
ID=32324963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/303,239 Expired - Fee Related US6849011B2 (en) | 2002-11-23 | 2002-11-23 | Engine endless drive belt tensioner and tensioner position indicator |
Country Status (1)
Country | Link |
---|---|
US (1) | US6849011B2 (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2879708A1 (en) * | 2004-12-20 | 2006-06-23 | Skf Ab | INSTRUMENT BELT TENSIONER ROLLING DEVICE AND METHOD OF CONTROLLING THE SAME |
FR2879707A1 (en) * | 2004-12-20 | 2006-06-23 | Skf Ab | Timing belt tensioning idler pulley device for use in internal combustion heat engine, has operating crank including reluctor unit for detecting predetermined wear limit of belt based on angular position of crank with respect to support |
US20060183585A1 (en) * | 2005-02-11 | 2006-08-17 | Quantum Corporation | Integrated belt tensioning devices and associated methods |
EP1877684A2 (en) * | 2005-04-21 | 2008-01-16 | Dayco Products, Llc. | Apparatus for indicating power transmission belt dynamics |
DE102017123095A1 (en) | 2017-10-05 | 2019-04-11 | Schaeffler Technologies AG & Co. KG | Measuring arrangement and method for determining the extent of an Antrbbriemens |
US10318930B2 (en) * | 2014-12-31 | 2019-06-11 | Ebay Inc. | Systems and methods to utilize smart components |
US10529148B2 (en) | 2014-12-31 | 2020-01-07 | Ebay Inc. | Systems and methods for multi-signal fault analysis |
US10685334B2 (en) | 2014-12-31 | 2020-06-16 | Ebay Inc. | Systems and methods for an E-commerce enabled digital whiteboard |
CN112945114A (en) * | 2021-01-15 | 2021-06-11 | 东风柳州汽车有限公司 | Belt elasticity detection mechanism and car |
US11093905B2 (en) | 2014-12-31 | 2021-08-17 | Ebay Inc. | Systems and methods to utilize an electronic garage shelf |
US11220956B2 (en) * | 2017-05-11 | 2022-01-11 | Schaeffler Technologies AG & Co. KG | Method for detecting belt slip |
US20220099165A1 (en) * | 2020-09-28 | 2022-03-31 | Caterpillar Inc. | Engine accessory drive system and one-piece bracket for same |
US11506264B2 (en) * | 2016-12-22 | 2022-11-22 | Dayco Europe S.R.L. | Sensorized tensioner |
US20230407948A1 (en) * | 2020-11-20 | 2023-12-21 | Manuel Lindner | Automatic Adjustment And Monitoring Of A Belt Drive |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2288227T3 (en) * | 2002-12-16 | 2008-01-01 | The Gates Corporation | ACTIVE TENSOR |
DE10326133B4 (en) * | 2003-06-06 | 2009-04-30 | Erhardt + Leimer Gmbh | Apparatus and method for controlling the tension of a circulating belt |
EP3323658B1 (en) * | 2011-05-13 | 2021-11-24 | Litens Automotive Partnership | Intelligent belt drive system and method |
JP2023059699A (en) * | 2021-10-15 | 2023-04-27 | セイコーエプソン株式会社 | Robot and adjustment method |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2182267A (en) * | 1937-07-28 | 1939-12-05 | Harold E Torell | Apparatus for measuring tension stresses |
US2471999A (en) * | 1945-10-30 | 1949-05-31 | Chatillon & Sons John | Cable tensiometer |
US3177708A (en) * | 1960-06-14 | 1965-04-13 | Tensitron Inc | Tension meter |
US3494183A (en) * | 1967-01-16 | 1970-02-10 | Martin T Sokolosky | Length and weight indicated mechanism for cable apparatus |
US4141245A (en) * | 1975-06-03 | 1979-02-27 | Brandstetter Heinz P | Device for the measurement of mechanical work and power |
US4362062A (en) * | 1980-01-09 | 1982-12-07 | V. Lowener Maschinen GmbH | Belt-tension gauge |
US4478595A (en) * | 1981-03-27 | 1984-10-23 | Nippondenso Co., Ltd. | Electric control apparatus for belt tensioners |
US5284116A (en) * | 1988-07-29 | 1994-02-08 | North American Philips Corporation | Vehicle management computer |
US5733214A (en) * | 1995-05-30 | 1998-03-31 | Honda Giken Kogyo Kabushiki Kaisha | System for adjusting tension of endless transmitting belt in internal combustion engine |
US5918729A (en) * | 1997-08-29 | 1999-07-06 | R. R. Donnelley & Sons Company | Chain tensioning device for bindery lines |
US5941483A (en) * | 1998-04-24 | 1999-08-24 | Volvo Trucks North America, Inc. | Service line clamp with cable tie mount |
US6364044B1 (en) * | 2000-03-16 | 2002-04-02 | Chih-Chen Juan | Control system for motor-assisted bicycle |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6293556A (en) * | 1985-10-17 | 1987-04-30 | Kubota Ltd | Display device for looseness of belt in tension clutch |
JPH02118252A (en) * | 1988-10-28 | 1990-05-02 | Nippon Seiko Kk | Method for regulating tensile force of belt by automatic tensioner |
GB9813961D0 (en) * | 1998-06-30 | 1998-08-26 | Renold Plc | Method and apparatus for tensioning a chain of an internal combustion engine |
IT1320364B1 (en) * | 2000-05-25 | 2003-11-26 | A E Assemblaggi Elettromeccani | WEAR SENSOR DEVICE OF A DRIVE BELT OR CHAIN, IN PARTICULAR FOR A DRIVE SHAFT OF THE DRIVE SHAFT |
FR2832201B1 (en) * | 2001-11-13 | 2004-03-19 | Skf Ab | INSTRUMENT TENSIONING DEVICE AND ASSOCIATED CONTROL METHOD |
-
2002
- 2002-11-23 US US10/303,239 patent/US6849011B2/en not_active Expired - Fee Related
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2182267A (en) * | 1937-07-28 | 1939-12-05 | Harold E Torell | Apparatus for measuring tension stresses |
US2471999A (en) * | 1945-10-30 | 1949-05-31 | Chatillon & Sons John | Cable tensiometer |
US3177708A (en) * | 1960-06-14 | 1965-04-13 | Tensitron Inc | Tension meter |
US3494183A (en) * | 1967-01-16 | 1970-02-10 | Martin T Sokolosky | Length and weight indicated mechanism for cable apparatus |
US4141245A (en) * | 1975-06-03 | 1979-02-27 | Brandstetter Heinz P | Device for the measurement of mechanical work and power |
US4362062A (en) * | 1980-01-09 | 1982-12-07 | V. Lowener Maschinen GmbH | Belt-tension gauge |
US4478595A (en) * | 1981-03-27 | 1984-10-23 | Nippondenso Co., Ltd. | Electric control apparatus for belt tensioners |
US5284116A (en) * | 1988-07-29 | 1994-02-08 | North American Philips Corporation | Vehicle management computer |
US5733214A (en) * | 1995-05-30 | 1998-03-31 | Honda Giken Kogyo Kabushiki Kaisha | System for adjusting tension of endless transmitting belt in internal combustion engine |
US5918729A (en) * | 1997-08-29 | 1999-07-06 | R. R. Donnelley & Sons Company | Chain tensioning device for bindery lines |
US5941483A (en) * | 1998-04-24 | 1999-08-24 | Volvo Trucks North America, Inc. | Service line clamp with cable tie mount |
US6364044B1 (en) * | 2000-03-16 | 2002-04-02 | Chih-Chen Juan | Control system for motor-assisted bicycle |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2879708A1 (en) * | 2004-12-20 | 2006-06-23 | Skf Ab | INSTRUMENT BELT TENSIONER ROLLING DEVICE AND METHOD OF CONTROLLING THE SAME |
FR2879707A1 (en) * | 2004-12-20 | 2006-06-23 | Skf Ab | Timing belt tensioning idler pulley device for use in internal combustion heat engine, has operating crank including reluctor unit for detecting predetermined wear limit of belt based on angular position of crank with respect to support |
US20060183585A1 (en) * | 2005-02-11 | 2006-08-17 | Quantum Corporation | Integrated belt tensioning devices and associated methods |
EP1877684A2 (en) * | 2005-04-21 | 2008-01-16 | Dayco Products, Llc. | Apparatus for indicating power transmission belt dynamics |
EP1877684A4 (en) * | 2005-04-21 | 2009-04-08 | Dayco Products Llc | Apparatus for indicating power transmission belt dynamics |
AU2006240253B2 (en) * | 2005-04-21 | 2012-02-02 | Dayco Ip Holdings, Llc | Apparatus for indicating power transmission belt dynamics |
US11900334B2 (en) | 2014-12-31 | 2024-02-13 | Ebay Inc. | Systems and methods to utilize an electronic garage shelf |
US10318930B2 (en) * | 2014-12-31 | 2019-06-11 | Ebay Inc. | Systems and methods to utilize smart components |
US10529148B2 (en) | 2014-12-31 | 2020-01-07 | Ebay Inc. | Systems and methods for multi-signal fault analysis |
US10685334B2 (en) | 2014-12-31 | 2020-06-16 | Ebay Inc. | Systems and methods for an E-commerce enabled digital whiteboard |
US11687883B2 (en) | 2014-12-31 | 2023-06-27 | Ebay Inc. | Systems and methods for an e-commerce enabled digital whiteboard |
US11093905B2 (en) | 2014-12-31 | 2021-08-17 | Ebay Inc. | Systems and methods to utilize an electronic garage shelf |
US11594080B2 (en) | 2014-12-31 | 2023-02-28 | Ebay Inc. | Systems and methods for multi-signal fault analysis |
US11475415B2 (en) | 2014-12-31 | 2022-10-18 | Ebay Inc. | Systems and methods to utilize smart components |
US11506264B2 (en) * | 2016-12-22 | 2022-11-22 | Dayco Europe S.R.L. | Sensorized tensioner |
US11220956B2 (en) * | 2017-05-11 | 2022-01-11 | Schaeffler Technologies AG & Co. KG | Method for detecting belt slip |
DE102017123095A1 (en) | 2017-10-05 | 2019-04-11 | Schaeffler Technologies AG & Co. KG | Measuring arrangement and method for determining the extent of an Antrbbriemens |
US20220099165A1 (en) * | 2020-09-28 | 2022-03-31 | Caterpillar Inc. | Engine accessory drive system and one-piece bracket for same |
US20230407948A1 (en) * | 2020-11-20 | 2023-12-21 | Manuel Lindner | Automatic Adjustment And Monitoring Of A Belt Drive |
CN112945114A (en) * | 2021-01-15 | 2021-06-11 | 东风柳州汽车有限公司 | Belt elasticity detection mechanism and car |
Also Published As
Publication number | Publication date |
---|---|
US6849011B2 (en) | 2005-02-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6849011B2 (en) | Engine endless drive belt tensioner and tensioner position indicator | |
US5780731A (en) | Method for judging the locked state of auxiliaries for automobiles | |
CN101189450B (en) | Apparatus for indicating power transmission belt dynamics | |
AU2003297008B2 (en) | Active tensioner | |
KR100663156B1 (en) | Tensioner | |
ATE197498T1 (en) | BELT TENSIONING DEVICE, PARTICULARLY FOR MOTOR VEHICLES | |
JP2009504997A (en) | Piston internal combustion engine and method for detecting the wear value of a transmission element arranged between a crankshaft and a camshaft | |
JP3648857B2 (en) | Auxiliary machine torque detector for belt transmission | |
US5952586A (en) | Device and method for accurately detecting torque of auxiliary device | |
JP3580005B2 (en) | Auxiliary torque calculation device | |
JPH0972394A (en) | Auxiliary machine torque detecting system | |
KR100203115B1 (en) | Engine belt tensioner | |
JP3651990B2 (en) | Auxiliary torque detection system | |
JPH1030693A (en) | Belt degradation judging method | |
KR200185698Y1 (en) | Warning device of belt tension | |
JP3894616B2 (en) | Method for determining the lock state of automotive auxiliary equipment | |
KR0143134B1 (en) | Efficiency tester of compressor for an automobile | |
JP2000105188A (en) | Friction coefficient-measuring device | |
KR970001127Y1 (en) | Timing belt tension detector | |
KR100476269B1 (en) | Belt tension warning device | |
KR19980046231A (en) | Belt tension warning device | |
KR19980041397A (en) | Check belt for driving engine of automobile | |
JP2002357493A (en) | Torque sensor, connection structure for the same, and engine-drive type air conditioner | |
JPH04109368U (en) | Engine rotation detection structure | |
KR970046306A (en) | V-belt damage warning device installed on vehicle engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CALFA, JEFFREY P.;MANARA, ALAN H.;REEL/FRAME:013387/0023 Effective date: 20021121 |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
AS | Assignment |
Owner name: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT, NE Free format text: SECURITY AGREEMENT;ASSIGNORS:INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY, LLC;INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, LLC;NAVISTAR INTERNATIONAL CORPORATION;AND OTHERS;REEL/FRAME:028944/0730 Effective date: 20120817 |
|
AS | Assignment |
Owner name: JPMORGAN CHASE BANK N.A., AS COLLATERAL AGENT, NEW Free format text: SECURITY AGREEMENT;ASSIGNORS:NAVISTAR INTERNATIONAL CORPORATION;INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, LLC;INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY, LLC;REEL/FRAME:036616/0243 Effective date: 20150807 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20170201 |
|
AS | Assignment |
Owner name: NAVISTAR INTERNATIONAL CORPORATION, ILLINOIS Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:044416/0867 Effective date: 20171106 Owner name: INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:044416/0867 Effective date: 20171106 Owner name: NAVISTAR, INC., ILLINOIS Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:044416/0867 Effective date: 20171106 Owner name: INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:044416/0867 Effective date: 20171106 Owner name: INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:044780/0456 Effective date: 20171106 Owner name: INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:044780/0456 Effective date: 20171106 Owner name: NAVISTAR INTERNATIONAL CORPORATION, ILLINOIS Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:044780/0456 Effective date: 20171106 |